<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <fieldset>
        <legend>登陆</legend>
        <p>用户名：</p>
        <p>密码：</p>
    </fieldset>
    <iframe style="width: 100%;height: 200px" src="http://www.baidu.com/"></iframe>
</body>
</html>